I really do not know how I feel about this being that I use my iPad about 5 to 6 hours a day. My iPad to ran rather cool while multi-tasking. Is anyone else having this issue?
The iPad 4 has a larger battery, so it's normal for it to feel warmer than the iPad 2 while performing equivalent tasks. The retina display uses significantly more battery power than the iPad 2 display, which accounts for most of the extra power requirement.